Tag
web-components
- Sep 24, 2026 Focus Across Shadow Roots and Frame Boundaries Where document.activeElement points when focus enters a shadow tree or an embedded document, what delegatesFocus changes, and why a custom element that contains a field is not a tab stop by default. accessibility
- Apr 2, 2025 Template Contents, Slots, and Declarative Shadow DOM A template owns a document fragment that never enters the page, slots decide which light-DOM children render where, and a shadowrootmode attribute can attach a shadow root during parsing. web platform
- Aug 1, 2023 Custom Element Reactions and Their Synchronous Callback Contract Lifecycle callbacks are queued reactions invoked at the end of the DOM operation that caused them, which makes them synchronous but batched, and explains upgrade ordering. web platform